Coiled Tubing Extended Reach with Downhole Motors

Abstract

Disclosed is a method to enhance the reach of coiled tubing in the lateral section of a wellbore. The application of this method may enhance the use of coiled tubing in drilling very deep flowing wells. Similarly, the method may be applied in increasing the reach of the tubing for other coiled tubing well intervention applications. The method involves the use of downhole motor assemblies, stabilizers, and dynamic torque arrestors to rotate coiled-tubing string.

What is claimed is: 
     
         1 . A method of drilling with coiled tubing, the method comprising;
 attaching a drill assembly to a coiled tubing;   attaching a second motor assembly to the drill assembly;   inserting the second motor assembly, the drill assembly, and the coiled tubing downhole;   attaching a first motor assembly to the coiled tubing;   inserting the first motor assembly downhole;   rotating the coiled tubing with the first motor assembly; and   rotating the drill assembly with the second motor assembly.   
     
     
         2 . The method of  claim 1 , wherein the first motor assembly rotates the coiled tubing between the first motor assembly and the second motor assembly. 
     
     
         3 . The method of  claim 1 , wherein the drill assembly further comprises a drill bit. 
     
     
         4 . The method of  claim 1 , wherein the first motor assembly is connected to a stabilizer. 
     
     
         5 . The method of  claim 4 , further wherein there are at least two stabilizers. 
     
     
         6 . The method of  claim 1 , wherein the first motor assembly is connected to a dynamic torque arrestor. 
     
     
         7 . The method of  claim 6 , further wherein there are at least two dynamic torque arrestors. 
     
     
         8 . The method of  claim 1 , wherein the motor assembly is connected to both a stabilizer and a dynamic torque arrestor. 
     
     
         9 . The method of  claim 8 , wherein the first motor assembly is connected to a plurality of stabilizers and a plurality of dynamic torque arrestors. 
     
     
         10 . A dynamic torque arrestor, comprising:
 a casing;   an adapter at one end of the casing; and   a connector opposite the adapter.   
     
     
         11 . The dynamic torque arrestor of  claim 10 , wherein the casing further comprises:
 an inner casing;   a spindle;   a machined spring;   an upper plate; and   a lower plate.   
     
     
         12 . The dynamic torque arrestor of  claim 11 , wherein the inner casing is attached to the upper plate. 
     
     
         13 . The dynamic torque arrestor of  claim 11 , wherein the inner casing is divided into a lower and an upper area. 
     
     
         14 . The dynamic torque arrestor of  claim 13 , wherein the lower area further comprises:
 a thrust ball bearing; and   an axial roller bearing.   
     
     
         15 . The dynamic torque arrestor of  claim 13 , wherein the upper area further comprises a highly viscous fluid. 
     
     
         16 . The dynamic torque arrestor of  claim 11 , wherein the machined spring is disposed upon the adapter. 
     
     
         17 . They dynamic torque arrestor of  claim 11 , wherein the lower plate guides and prevents lateral movement of the machined spring. 
     
     
         18 . The dynamic torque arrestor of  claim 17 , further comprising multiple lower plates. 
     
     
         19 . They dynamic torque arrestor of  claim 11 , wherein the spindle is disposed upon the machined spring. 
     
     
         20 . The dynamic torque arrestor of  claim 11 , wherein the upper plate further comprises perforations.